274 ME. "W. F. KIEBY — A REVISION OF 



followed by two or three rows of cells, one or two cross nervures in the lower basal 

 cell, sectors of the triangle rising from a point : anal appendages of the male short 

 and slender. 



Type Lihellula tenera, Say. 



Genus 16. Pseudoleox, g. n. 

 (Plate LIII. fig. 7.) 



Frontal tubercle bifid ; eyes contiguous ; abdomen moderately slender, shorter than 

 the hind wings, not thickened at base, segments 2 and 3 carinated, 4 imperfectly : 

 wings rather short and broad, of an extremely iridescent hyaline, mottled with brown 

 or purplish brown as in many Myrmeleonidce, pointed at the tips, pterostigma long ; 

 fore wings with 9-10 antenodal nervures, the last not continuous, and 5-6 postnodals, 

 the first two not continuous, the postnodals are very irregular in both costal spaces, 

 and most of them are oblique, cells of the postnodal area simple, triangle long and 

 narrow, just beyond that of the hind wings, traversed by a nervure across its upper 

 portion, base oblique, followed by four rows of cells increasing, or by a row of four 

 cells, followed by a series of three increasing, subtriangular space composed of three 

 cells ; no supratriangular nervures, one cross nervure in the lower basal cell, sectors of 

 the arculus stalked and considerably curved at the extremity, the nodal sector much 

 waved beyond the middle, and as well as the subnodal sector considerably curved at 

 the extremity, most of the intermediate cells bisected beyond the middle ; hind wings 

 rather broader than the fore wings, with 7-8 antenodal and 5-6 postnodal nervures, 

 the first two postnodals (between which and the third there is rather a wide gap, which 

 is likewise the case on the fore wings) are not continuous, triangle traversed, its base 

 corresponding to the arculus, followed by three rows of cells increasing, a supratri- 

 angular nervure exceptionally present, one cross nervure on the lower basal cell, sectors 

 of the triangle united at the base : anal appendages of the male rather stout, as long as 

 the last two segments ; lower appendage hardly shorter than the others. 



Type Celithemis superba, Hag. 



Genus 17. Celithemis. 



(Plate LI I. fig. 2.) 



Hagen, Neur. N. Amer. p. 147 (1861) ; Brauer, Verh. zool.-bot. Ges. Wien, xvii. pp. 367, 718 

 (1868). 



Frontal tubercle truncated above ; eyes contiguous ; abdomen rather slender, shorter 

 than the hind wings, the basal segment not thickened, 2 and 3 transversely carinated, 

 segment 8 not expanded in the female, pterostigma long; fore wings with 9-10 ante- 

 nodal and 7-10 postnodal nervures, the last antenodal sometimes continuous, and the 

 first three or four postnodals not continuous, cells of the costal area simple, triangle 

 moderate, placed about level with that of the hind wings, consisting of 3-6 cells, or 



